SU1305534A1 - Device for measuring angular displacements - Google Patents

Abstract

The invention relates to measuring, fielding technology and can be used, for example, in mechanical engineering and boiler building, mainly in technological devices with positioning of workpieces and tools. The aim of the invention is to improve the measurement accuracy by increasing the time interval proportional to the phase shift at the output of the angular displacement sensor. The signal from the oscillator 2 clock frequency of the block 1 forming the signal of the reference frequency is fed to the inputs of dividers 3 and 11 of the pulse frequency and the first input 1 of the key element 8-. From the outputs of the dividers 3 and 11 of the pulse frequency through the formers 4 and 12 of sinusoidal voltage, respectively, these signals arrive at the inputs of the selsyn 6 and 7 of the angular displacement sensor 5, as well as at the inputs of the frequency converter 13. The signals from the outputs of blocks 1 and 10 of the form of the signals of the reference frequency in frequency are close to each other. When the shaft 17 connected with the object to be controlled is rotated, the voltages at the outlets of the selsynes b, 7 are shifted in phase, and the direction of the phase shift is opposite. In this case, the output of the converters 13

Description

and 14 frequency is the difference frequency signals. The signal at the output of the frequency converter 14 is phase shifted relative to the signal at the output of the frequency converter 13. These signals through the shaper 15 and 16 are fed to the second and third inputs of the key element 8, to the first input of which

The invention relates to a measuring technique and can be used, for example, in mechanical engineering and boiler building, mainly in technological devices with positioning of workpieces and tools.

The purpose of the invention is to improve the measurement accuracy by increasing the time interval proportional to the phase shift at the output of the angular displacement sensor.

FIG. 1 shows a functional diagram of the device; in fig. 2 - timing charts of the device.

The device contains the first block 1 of forming the reference frequency signal having a generator of 2 clock frequencies in its composition, a divider of 3 pulses and a shaper 4 of sinusoidal voltage, an angular displacement sensor 5 made in the form of phase shifters 6 and 7, for example, selsins, key element 8, the indicator 9. The device also contains the second block of the formation of the reference frequency signal, comprising a pulse frequency divider 11 and a sinusoidal voltage driver 12, frequency converters 13 and 14 made, for example measures of the balanced modulator circuit with E shaper 15 and 16 respectively at the outputs of the pulse, made, for example, by Schmidt trigger circuit. The rotors of phase shifters 6 and 7 are fixed on the same shaft 17 connected with the object being monitored, and rotated relative to each other by 180. In this case, the inputs of phase shifters 6 and 7 are the first and second inputs of the sensor 5, respectively, and clock pulses are fed from the LIGHT 1 of the formation signal reference frequency. The number of key elements 8 allocated is averaged, converted and displayed at the output of indicator 9 on the scale of the magnitude of the angle of rotation of the shaft 17 of the sensor 5. 2 Il.

five

0

five

0

five

0

The first and second outputs of the angular movement sensor 5 are respectively the outputs of the rotators 6 and 7.

The first output of the reference frequency signal generation unit 1 and the output of the reference frequency signal generation unit 10 and the output of the reference frequency signal generation unit 10 are connected respectively to the first and second inputs of the angular displacement sensor 5 and the corresponding inputs of the first frequency converter 13.

The first and second outputs of the sensor 5 of the angular displacements are connected to the corresponding inputs of the second frequency converter 14.

The outputs of the converters 13 and 14 frequencies are connected respectively with the inputs of the formers 15 and 16 pulses, the outputs of which, in turn, are connected respectively with the second and third inputs of the key element 8.

The first input of the key element 8 M of the input of the second frequency signal generation unit 10 is connected to the second output of the first frequency signal generation unit 1. The output of the key element 8 is connected to the indicator 9.

The output of the oscillator 2 clock frequency is connected to the input of the divider 3 pulse frequency.

The outputs of the dividers 3 and 11 of the pulse frequencies are connected respectively to the inputs of the shaper 4 and 12 of sinusoidal voltage.

The output of the sinusoidal voltage driver 4 is the first output of the first block 1 of the formation of the reference frequency signal, and the output of the form 31305534

The sinusoidal voltage changer 12 is the output of the second block 10 of the reference frequency driver.

The division factors of dividers 3 and 11 of the pulse frequency are close in magnitude.

The device works as follows. .

The clock frequency generator 2 generates a signal that arrives at the inputs of the divider 3 and 11 pulse frequencies and to the first input of the key element 8.

From the outputs of the dividers 3 and 11 of the pulse frequency, the signals of a close frequency arrive, respectively, at the inputs of the forma- tion of the reference frequency signal; the substitute 4 and 12 are sinusoidal; 6 and 7 of the sensor 5 angular displacements and to the inputs of the frequency converter 13.

The diagrams (18 and 19) of the stresses generated respectively at the outputs of the formers 4 and 12 are shown in FIG. 2.25

When the shaft 17 (Fig. 1), connected with the object being monitored, is rotated, the voltage is shifted at the outputs of selsins 6 and 7, and the phase shift direction (q) is opposite to 30 outputs of the first and second (Fig. 2, diagrams 21 and 22). Of the signal conditioning blocks

Using a frequency converter 13, a difference frequency signal 20 (Fig. 2) is extracted, which is fed to the input of a pulse shaper 15.

At the output of the frequency converter 14 (Fig. T), the differential frequency signal 23 (Fig. 2) is outlined in phase relative to the signal at the output of the frequency converter 13 by an angle proportional to the angle of rotation of the shaft 17 of the angular displacement sensor 5.

This signal is fed to the input of a 16 pulse generated.

The key element 8 (Fig. 1), controlled by the second and third inputs, respectively, by the output signals of the pulse shaping 15 and 16, passes to the input of the indicator 9 as well .50 lx and the second outputs of the sensor are angular pulses from the output of the first displacement connected correspondence 1 of the formation of the signal 24 of the reference but to the outputs of the first and second phase-frequency in the interval of time (figure 2), of the inverters.

the value of which is proportional to the phase shift at the outputs of the frequency converters 13 and 14.

The number of pulses allocated by key 5 element 8 is averaged, converted and displayed at the output of digital indicator 9 on the scale of the angle of rotation of the shaft 17 of the sensor 5 of angular movements.

Claims (1)

Formula of the invention n. A device for measuring angular movements, comprising a block of form movements, a key element, the first input of which is connected to the second output of a reference frequency signal generating unit, an indicator connected to the output of a key element, characterized in that equipped with a second reference signal generating unit, connected to the second output of the first reference signal generating unit, with two frequency converters, the first of which is connected to the reference frequency, the second - respectively to the first and second outputs of the sensor of angular movements, two 35 pulse shapers connected to the outputs of the corresponding trans. frequency converters, the outputs of the first and second pulse shapers are connected respectively to the second 40 and the third inputs of the key element, the angular displacement sensor is made in the form of two phase shifters, the rotors of which are fixed on one shaft connected to the object being monitored and turned 180 ° relative to each other, the inputs of the first and second phase shifters are connected respectively to the first and second inputs of the angular displacement sensor, and the first the value of which is proportional to the phase shift at the outputs of the frequency converters 13 and 14. The number of pulses allocated by the key element 8 is averaged, converted and displayed at the output of the digital indicator 9 on the scale of the angle of rotation of the shaft 17 of the sensor 5 of angular displacements. reference frequency signal, connected to its output by an angular Formula of the invention n. An apparatus for measuring angular displacements, comprising a reference frequency signal generating unit, an angle sensor connected to its output the outputs, respectively, of the first and second signal conditioning units displacement, the key element, the first input of which is connected to the second output of the reference signal generating unit, the indicator connected to the output of the key element, characterized in that, in order to improve the measurement accuracy, it is equipped with a second reference signal generating unit connected to the second output of the first frequency signal shaping unit, two frequency converters, the first of which is connected to The top and second outputs of the angular displacement sensor are connected respectively to the outputs of the first and second phase detectors. the reference frequency, the second - respectively to the first and second outputs of the sensor of angular movements, two pulse drivers connected to the outputs of the corresponding frequency converters, the outputs of the first and second pulse drivers are connected respectively to the second and to the third inputs of the key element, the angular displacement sensor is made in the form of two phase shifters, the rotors of which are fixed on one shaft connected to the object being monitored and turned 180 ° with respect to each other, the inputs of the first and second phase shifters are connected respectively to the first and the second inputs of the atchik of angular displacements, and -VWWWWV LLLLLDADDA; - mlllll v7 2 IP fpt / e.2